0401 can be:

EGR (NOT likely.. doing the "suck test" will eliminate the EGR)

vacuum leak in the green vacuum tubing, rubber elbow at the end, etc)

bad EGR gasket

Faulty DPFE


Ray

'99 CSVT - Silver #222/276 In a constant state of blow-off euphoria.
Originally posted by Kremitthefrog:
I like to wear dresses and use binoculars to watch grandmas across the street.